How long is Serious Sam: Siberian Mayhem?

Serious Sam: Siberian Mayhem takes about 4h 29m to beat the main story, or around 6h 16m with extras.

How long does it take to 100% Serious Sam: Siberian Mayhem?

A completionist run of Serious Sam: Siberian Mayhem takes about 8h 1m.

74Meta Score

Very Positive93% · 4,374

Serious Sam: Siberian Mayhem

Shooter Adventure Action

Developer: Timelock Studio, Croteam|Publisher: Devolver Digital

Base Game: Serious Sam 4

Playtime

HowLongToBeat · Medium confidence

Main Story

4h 29m

Main + Extra

6h 16m

Completionist

8h 1m

Media

1 video + 8 screenshots

Links

Steam GOG PlayStation Official Twitch Discord X / Twitter

About This Game

Serious Sam: Siberian Mayhem is a new stand-alone expansion to the world of the classic FPS series. Join the fight against Notorious Mental on a journey through the wild lands of Russia, and find your way through this lost chapter of Sam Stone's adventures.

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Last updated Mar 7, 2026